I noticed the erratic behavior before I started noticing the thinning hair and bald spots. I thought that baldness was a problem that only humans suffered from, but my veterinarian told me that pet hair loss is actually quite common. Any different number of things can cause hair loss in animals, so I had to take her in to find out exactly what was causing my cat’s hair to fall out. The poor thing had to go through X-Rays, an MRI and the needles to draw blood for testing, all to find out that the hair loss was being caused by stress. The Vet told me that any time you introduce a new party into an environment that it can have a negative effect on the pets involved. My wife and I had a baby about two months ago and that’s just about when all the erratic behavior began. The Vet told us that there were many things that we could try to help the situation, but that it was likely that we would have to put the cat on behavior medication to help ease the stress. We’re going to try one cycle of the medication, and if it works she’ll probably have to be on it for the rest of her life.